Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae8fadaf95a7d9a…

MALICIOUS

PDF

63.8 KB Created: 2021-01-17 11:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 22bc166293bc42c6db0c03c1b2c8cefa SHA-1: 91af86ceb1ce7cafc28c99805345d232ab37e70c SHA-256: 4ae8fadaf95a7d9a8f4f2395a4d5e8e871fafddba9b598a40426e088991c9e75
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with one specifically identified as a lure for 'jayanagar weather report'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts with minimal content, suggesting a malicious intent to distribute or redirect. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffe.ru/aws?utm_term=jayanagar+weather+report PDF link annotation
    • https://site-1174473.mozfiles.com/files/1174473/electricit_de_france_s__a__annual_report.pdfIn PDF document text
    • https://site-1175575.mozfiles.com/files/1175575/bts_love_yourself_answer_live.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/laluvinojutomomo.pdfIn PDF document text
    • https://site-1166601.mozfiles.com/files/1166601/bubble_animation_android_github.pdfIn PDF document text
    • https://site-1177386.mozfiles.com/files/1177386/57393169600.pdfIn PDF document text
    • https://site-1176782.mozfiles.com/files/1176782/fexomozexowimeg.pdfIn PDF document text
    • https://site-1176636.mozfiles.com/files/1176636/zumuwufinazat.pdfIn PDF document text
    • https://site-1083884.mozfiles.com/files/1083884/score_hero_hacked_version_download_uptodown.pdfIn PDF document text
    • https://site-1176740.mozfiles.com/files/1176740/finatogidomojagevid.pdfIn PDF document text
    • https://zolalaroka.weebly.com/uploads/1/3/4/5/134591985/4610277.pdfIn PDF document text
    • https://site-1178336.mozfiles.com/files/1178336/ragdoll_stickman_swinging.pdfIn PDF document text
    • https://site-1180242.mozfiles.com/files/1180242/89973758013.pdfIn PDF document text
    • https://site-1203132.mozfiles.com/files/1203132/coraline_theme_piano_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiduvunizujenav.rf.gd/30_day_abs_and_squat_challenge.pdfIn PDF document text
    • http://pivujumurabaf.epizy.com/rupajaxofiganaridagimep.pdfIn PDF document text
    • http://mubaviz.epizy.com/parazurugewigi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8B 5052 bytes
SHA-256: cde8c9832adbd3ba64a0137aa53780ba9adee10ae9a85717597adbedc8bb623d
font_01_sfnt_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 9944 bytes
SHA-256: 3fb7cb3d8b27d70c977acdf788882ae06d7aeb91050db2acd8e219f30c522451

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